 
#pragma once

#ifdef _MSC_VER
 
/**//* For communication from `getopt' to the caller.
 When `getopt' finds an option that takes an argument, 
 the argument value is returned here.
 Also, when `ordering' is RETURN_IN_ORDER, 
 each non-option ARGV-element is returned here.*/
 
PLATFORM_API extern char *optarg; 
 
/**//* Index in ARGV of the next element to be scanned.
 This is used for communication to and from the caller 
 and for communication between successive calls to `getopt'. 
 
 On entry to `getopt', zero means this is the first call; initialize.
 
 When `getopt' returns -1, this is the index of the first of the 
 non-option elements that the caller should itself scan. 
 
 Otherwise, `optind' communicates from one call to the next
 how much of ARGV has been scanned so far.*/ 
 
PLATFORM_API extern  int optind; 
 
/**//* Callers store zero here to inhibit the error message `getopt' prints
 for unrecognized options.*/ 
 
PLATFORM_API extern  int opterr; 
 
/**//* Set to an option character which was unrecognized.*/
 
PLATFORM_API extern  int optopt; 
 
/**//* Describe the long-named options requested by the application. 
 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
 of `struct option' terminated by an element containing a name which is
 zero. 
 
 The field `has_arg' is: 
 no_argument(or 0) if the option does not take an argument,
 required_argument(or 1) if the option requires an argument, 
 optional_argument(or 2) if the option takes an optional argument. 
 
 If the field `flag' is not NULL, it points to a variable that is set
 to the value given in the field `val' when the option is found, but 
 left unchanged if the option is not found.
 
 To have a long-named option do something other than set an `int' to 
 a compiled-in constant, such as set a value from `optarg', set the
 option's `flag' field to zero and its `val' field to a nonzero
 value (the equivalent single-letter option character, if there is 
 one).For long options that have a zero `flag' field, `getopt' 
 returns the contents of the `val' field.*/
 
struct option
{
char *name;
/**//* has_arg can't be an enum because some compilers complain about
 type mismatches in all the code that assumes it is an int.*/
int has_arg; 
int *flag; 
int val; 
}; 
 
/**//* Names for the values of the `has_arg' field of `struct option'.*/ 
 
#define no_argument 0
#define required_argument 1
#define optional_argument 2
 
PLATFORM_API int getopt_long(int argc, char *const *argv, const char *shortopts, const struct option *longopts, int *longind);
PLATFORM_API int getopt_long_only (int argc, char *const *argv, const char *shortopts, const struct option *longopts, int *longind);  
PLATFORM_API int getopt (int argc, char *const *argv, const char *optstring);
  
#endif // #ifdef _MSC_VER
